EP1777027B1 - Fraise pour l'ébauche de pièces à usiner - Google Patents

Fraise pour l'ébauche de pièces à usiner Download PDF

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Publication number
EP1777027B1
EP1777027B1 EP05109903A EP05109903A EP1777027B1 EP 1777027 B1 EP1777027 B1 EP 1777027B1 EP 05109903 A EP05109903 A EP 05109903A EP 05109903 A EP05109903 A EP 05109903A EP 1777027 B1 EP1777027 B1 EP 1777027B1
Authority
EP
European Patent Office
Prior art keywords
cutting
milling tool
bevel
cutting edges
roughing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05109903A
Other languages
German (de)
English (en)
Other versions
EP1777027A1 (fr
Inventor
Tiziano Sichi
Josef Maushart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraisa Holding AG
Original Assignee
Fraisa Holding AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35892405&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1777027(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraisa Holding AG filed Critical Fraisa Holding AG
Priority to DE502005004292T priority Critical patent/DE502005004292D1/de
Priority to EP05109903A priority patent/EP1777027B1/fr
Priority to AT05109903T priority patent/ATE396814T1/de
Priority to JP2006288297A priority patent/JP2007118178A/ja
Priority to US11/585,676 priority patent/US7771141B2/en
Publication of EP1777027A1 publication Critical patent/EP1777027A1/fr
Application granted granted Critical
Publication of EP1777027B1 publication Critical patent/EP1777027B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/28—Angles
    • B23C2200/286—Positive cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/36—Other features of the milling insert not covered by B23C2200/04 - B23C2200/32
    • B23C2200/365—Lands, i.e. the outer peripheral section of rake faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/08—Side or top views of the cutting edge
    • B23C2210/088—Cutting edges with a wave form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2220/00—Details of milling processes
    • B23C2220/60—Roughing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1946—Face or end mill
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1946—Face or end mill
    • Y10T407/1948—Face or end mill with cutting edge entirely across end of tool [e.g., router bit, end mill, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1952—Having peripherally spaced teeth
    • Y10T407/1962—Specified tooth shape or spacing
    • Y10T407/1964—Arcuate cutting edge
    • Y10T407/1966—Helical tooth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/27—Cutters, for shaping comprising tool of specific chemical composition

Definitions

  • the present invention relates to a milling tool for roughing workpieces, which is provided with a plurality of cutting edges and arranged therebetween flutes, which cutting edges are provided on the cutting side with cutting edges with a predetermined rake angle and the cutting edges have a wavy profile, which is across the width the cutting edges extends and which is provided in the region of the cutting edge with a chamfer.
  • a milling tool is published in the patent publication JP 09 029 530 A known.
  • the goal is to maximize the chip removal rate, thereby reducing the cost of manufacturing the workpieces and increasing productivity.
  • milling tools are used, which are made of hard metal, which material is relatively brittle.
  • High-alloy HSS tools are also used. Because of the brittleness of the materials, there is a risk that breaking of the wave crest edges occurs when machining tough materials, which greatly reduces the performance of this corresponding workpiece. Thus, the wear of such milling tools is relatively large.
  • the object of the present invention is therefore to design a milling tool for roughing workpieces in such a way that Breakdowns in the region of the cutting edges and in particular in the wave crests of the wave-shaped profile are avoided as possible, with the provisions that are made to the least possible effort to result.
  • this object is achieved in that the chamfer extends at least over the entire height of the wave crests of the wave-shaped profile, which chamfer has a wedge angle which is blunt than the wedge angle of the milling tool.
  • this bevel in the wavy profile can be easily obtained by a single surface grinding process, respectively along the curved cutting edge, which can be achieved very inexpensively.
  • This mounted chamfer of the cutting wedge is reinforced, whereby the breaking of these wave peaks during the machining process, that is, when roughing a workpiece, can be massively limited. As a result, a tool is obtained, with which material removal can be performed in an efficient manner and which is characterized by a long service life.
  • a further advantageous embodiment of the invention is that the ground surface of the chamfer has a lower roughness than the surface of the flutes. This has the consequence that the processed chips are optimally routed away.
  • the rake angle of the chamfer is in the range of 0 ° to -30 °, preferably about -25 °. In these rake angle ranges, an optimum chip removal volume is achieved with a simultaneously high service life.
  • the milling tool consists of a hard metal, whereby high feed rates can be obtained.
  • a milling tool 1 for roughing of workpieces which comprises a cylindrical shaft 2.
  • a cylindrical shaft 2 In the lower part of this cylindrical shaft 2 is provided with flutes 4, between the flutes 4 are the cutting edges 3.
  • the flutes 4 and consequently the cutting edges 3 are arranged spirally.
  • the cutting edges 3 are provided on the cutting side 5 with cutting edges 6, which are equipped with a predetermined rake angle.
  • the cutting edges 6 have a wave-shaped profile 7, which extend over the width b of the cutting edges 3.
  • Such wavy profiles are known, for example, under the designation "NRF”, “NRC”, “NR”, “WRC” or "NF".
  • this milling tool can be clamped with the cylindrical shaft 2 in a corresponding machine tool, the workpiece can be subsequently processed by the roughing.
  • Fig. 2a shows a spatial representation of the inventive milling according to Fig. 1 with the cylindrical shaft 2, the Cutting edges 3, the flutes 4 and the wavy profile 7.
  • Fig. 2b is a part of a cutting edge 3 can be seen, on which the wavy profile 7 extends. Also visible is a part of a flute 4.
  • the cutting edge 6 can be seen. Because of the wave-shaped profile 7 on the cutting edge 3, the cutting edge 6 has a wavy shape with wave crests 8 and wave troughs 9.
  • a chamfer 10 is ground, which will be described in detail later.
  • solid line 11 the embodiment is shown, in which the chamfer 10 is located only in the upper region of the wave crests 8.
  • Fig. 3 From the sectional view according to Fig. 3 In the illustrated detail, the flute 4 can be seen and the cutting edge 3 with the cutting edge 6. Also visible is a wave crest 8 and a wave trough 9 of the wave-shaped profile 7, which extends over the entire cutting edge 3. In Fig. 3 is also the chamfer 10 can be seen, with which the wave crests 8 are provided in the region of the cutting edge 6.
  • Fig. 3 is also the rake angle ⁇ 1 of the cutting edge of the milling tool can be seen if no bevel 10 would be attached.
  • the angle ⁇ 2 shows the rake angle of the chamfers 10 attached to the wave crests 8.
  • the wedge angle ⁇ which the milling tool has without the chamfer attached, is also shown.
  • the wedge angle ⁇ can be seen that forms the tool with the ground bevel 10.
  • the wedge angle ⁇ with the chamfer 10 is blunt than the wedge angle ⁇ , which the milling tool has without this chamfering.
  • this bevel 10 can be produced along the cutting edge 6 with a single flat grinding process.
  • the surface of the chamfer is ground very fine, so that it usually has a lower surface roughness than the surface of the flutes, whereby an optimal sliding of the processed chips on the workpiece is achieved. It is also conceivable that the roughness of the ground bevel surface and the ground surface of the flutes are practically the same and very low.
  • the production of this chamfer 10 is very simple and therefore inexpensive.
  • the milling tool is reinforced for roughing workpieces at the cutting edges, with the result that the otherwise known eruptions, in particular in the region of the peaks of the wave crests, can be substantially prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Turning (AREA)

Claims (5)

  1. Fraise pour l'ébauche de pièces à usiner, qui est munie de plusieurs flancs de coupe (3) et de goujures intercalées (4), les flancs de coupe (3) qui sont munis sur la face de coupe (5) de bords de coupe (6) avec un angle d'attaque (y1) et les bords de coupes (6) présentant un profilé ondulé (7), qui s'étend sur la largeur des flancs de coupe (3) et qui est muni dans la zone du bord de coupe d'un listel (10), caractérisée en ce que le listel (10) s'étend au moins sur l'ensemble de la hauteur des sommets d'ondulations (8) du profilé ondulé (7) et listel (10) qui présente un angle de taillant (β) qui est plus obtus que l'angle de taillant (α) de la fraise (1).
  2. Fraise selon la revendication 1, caractérisée en ce que le listel (10) est accessible par un meulage à plat des sommets d'ondulations (8).
  3. Fraise selon la revendication 1 ou 2, caractérisée en ce que la surface meulée du listel (10) présente une rugosité inférieure à celle de la surface des goujures (4).
  4. Fraise selon l'une des revendications 1 à 3, caractérisée en ce que l'angle d'attaque (y2) du listel est compris entre 0° et -30° de préférence - 25°.
  5. fraise selon l'une des revendications 1 à 6, caractérisée en ce qu'elle se compose de métal dur.
EP05109903A 2005-10-24 2005-10-24 Fraise pour l'ébauche de pièces à usiner Active EP1777027B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE502005004292T DE502005004292D1 (de) 2005-10-24 2005-10-24 Fräswerkzeug zum Schruppen von Werkstücken
EP05109903A EP1777027B1 (fr) 2005-10-24 2005-10-24 Fraise pour l'ébauche de pièces à usiner
AT05109903T ATE396814T1 (de) 2005-10-24 2005-10-24 Fräswerkzeug zum schruppen von werkstücken
JP2006288297A JP2007118178A (ja) 2005-10-24 2006-10-24 加工品荒削用のフライス削工具
US11/585,676 US7771141B2 (en) 2005-10-24 2006-10-24 Milling tool for roughing workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05109903A EP1777027B1 (fr) 2005-10-24 2005-10-24 Fraise pour l'ébauche de pièces à usiner

Publications (2)

Publication Number Publication Date
EP1777027A1 EP1777027A1 (fr) 2007-04-25
EP1777027B1 true EP1777027B1 (fr) 2008-05-28

Family

ID=35892405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05109903A Active EP1777027B1 (fr) 2005-10-24 2005-10-24 Fraise pour l'ébauche de pièces à usiner

Country Status (5)

Country Link
US (1) US7771141B2 (fr)
EP (1) EP1777027B1 (fr)
JP (1) JP2007118178A (fr)
AT (1) ATE396814T1 (fr)
DE (1) DE502005004292D1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL123794A (en) 1998-03-23 2000-11-21 Hanita Metal Works Ltd Milling cutter
US7563059B2 (en) * 2006-04-21 2009-07-21 Yg-1 Co., Ltd. Sinusoidal angled rotary cutting tool
US7588396B2 (en) * 2007-03-09 2009-09-15 Berkshire Precision Tool, Llc End mill
DE202008000350U1 (de) 2008-01-09 2008-05-21 Hofmann & Vratny Ohg Schruppfräser mit abgeschrägter Schneidkante
US8476832B2 (en) 2011-03-15 2013-07-02 Ford Global Technologies, Llc Vehicle interior lighting system with welcome and farewell stages
US8826784B2 (en) 2011-08-29 2014-09-09 United Technologies Corporation Airfoil machining method and cutting tools
US9512690B2 (en) 2012-12-18 2016-12-06 Smith International, Inc. Milling cutter having undulating chip breaker
JP5764181B2 (ja) 2013-10-31 2015-08-12 ユニオンツール株式会社 硬質皮膜被覆切削工具
DE102013225017B4 (de) * 2013-12-05 2015-10-29 Gottfried Wilhelm Leibniz Universität Hannover Fräswerkzeug und Umfangsfräsverfahren
US10118236B2 (en) * 2014-09-26 2018-11-06 Kennametal Inc. Rotary cutting tool
US10040136B2 (en) 2015-10-12 2018-08-07 Iscar, Ltd. End mill having teeth and associated flutes with correlated physical parameters
CN105618828A (zh) * 2016-04-08 2016-06-01 苏州阿诺精密切削技术股份有限公司 一种断齿粗铣刀
CN108971592A (zh) * 2018-09-03 2018-12-11 中山市园丰精密刃具有限公司 一种双倒角铣刀
CN113751775B (zh) * 2021-10-11 2022-09-06 深圳市蓝海永兴实业有限公司 一种带锯齿的陶碳复合材料切削铣刀

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4560308A (en) * 1984-08-13 1985-12-24 Trw Inc. Cutting tool
JPH06190622A (ja) * 1992-12-24 1994-07-12 Honda Motor Co Ltd エンドミル
JPH08112711A (ja) * 1994-10-17 1996-05-07 Hitachi Tool Eng Ltd 仕上用エンドミル
JPH0929530A (ja) * 1995-07-21 1997-02-04 Hitachi Tool Eng Ltd ラフィングエンドミル
JPH11216608A (ja) * 1998-01-30 1999-08-10 Hitachi Tool Eng Ltd ボ−ルエンドミル
JP2001300813A (ja) * 2000-02-18 2001-10-30 Sumitomo Electric Ind Ltd ボールエンドミル
JP2002361515A (ja) * 2001-06-08 2002-12-18 Hitachi Tool Engineering Ltd 軟質材切削用エンドミル
IL146370A (en) * 2001-11-06 2007-07-04 Hanita Metal Works Ltd Rotary milling cutter
DE20310713U1 (de) * 2003-07-12 2003-09-18 Fette GmbH, 21493 Schwarzenbek Stirnfräser
DE202004015757U1 (de) 2004-10-18 2005-07-21 Schmid, Harald Schruppfräser

Also Published As

Publication number Publication date
US7771141B2 (en) 2010-08-10
US20070122241A1 (en) 2007-05-31
EP1777027A1 (fr) 2007-04-25
ATE396814T1 (de) 2008-06-15
JP2007118178A (ja) 2007-05-17
DE502005004292D1 (de) 2008-07-10

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